#include <iostream>
#include <vector>
#include <algorithm>

int main() {
    unsigned n;
    std::cin >> n;
    std::vector<unsigned> v;
    v.reserve(n);
    for(unsigned i=0; i<n; ++i) {
        unsigned x;
        std::cin >> x;
        v.push_back(x);
    }
    std::sort(v.begin(), v.end());
    unsigned long pow2 = 1UL;
    unsigned long res = 0UL;
    for(unsigned i=n; i>0; ) {
        res += pow2 * v[--i];
        pow2 *= 2UL;
    }
    std::cout << res << std::endl;
    return 0;
}